The "alert" dialog is a notification dialog consisting of an alert message and a single button that closes the dialog.

Pay attention to the recommendations given for using modality in the Modal Contexts article. In certain scenarios it may be better to display a modal view instead.

The "confirm" dialog enables you to confirm the operation you are going to complete. The dialog shows a message and suggests two choices: "Yes" and "No". Note that the confirm dialog returns a Deferred object that contains a Boolean value indicating whether a user confirmed or canceled the action. Use the following code to obtain dialog results.

var showConfirm = function () {
    var result = DevExpress.ui.dialog.confirm("Are you sure?", "Confirm changes");
    result.done(function (dialogResult) {
        alert(dialogResult ? "Confirmed" : "Canceled");
    });
};

Pay attention to the recommendations given for using modality in the Modal Contexts article. In certain scenarios it may be better to display a modal view instead.

The custom method only creates a dialog. To show it, call the created dialog instance's show() method. The method returns a Promise that is resolved with the dialog result. This result is the object returned in the clicked dialog button's onClick function.

function() {
    var myDialog = DevExpress.ui.dialog.custom({
        title: "Custom dialog",
        message: "Dialog with custom buttons",
        buttons: [{
            text: "button 1",
            onClick: function (e) {
                return { buttonText: e.component.option("text"), /* ... */ }
            }
        }, 
        // ...
        ]
    });
    myDialog.show().done(function(dialogResult){
        console.log(dialogResult.buttonText); // Outputs the clicked button's text
    });
}

Use the hide() method to close the dialog before any button is clicked. In the following code, the dialog is hidden after 5 seconds if a user does not click a button:

function () {
    // ...
    setTimeout(function () { myDialog.hide(); }, 5000);
}